Flexible wing vehicle configurations



July 13, 1965 F. M. ROGALLO FLEXIBLE WING VEHICLE CONFIGURATIONS 7 Sheets-Sheet 1 Original Filed April 29, 1963 FIG. 2

FIG. I

FIG. 4 INVENTOR FRANCIS M. ROGALLO ATTORNEYS July 13, 1965 F. M. ROGALLO 3,194,514

FLEXIBLE WING VEHICLE CONFIGURATIONS Original Filed April 29, 1963 '7 Sheets-Sheet 2 INVENTO FRANCIS M. ROGALLS BY W ATTORNEYS July 13, 1965 F. M. ROGALLO 3,194,514 FLEXIBLE WING VEHICLE CONFIGURATIONS Original Filed April 29', 1963 7 Sheets-Sheet 3 INVENTOR FRANCIS M. ROGALLO ATTORNEYS July 13, 1965 F. M. ROGALLO 3,194,514

FLEXIBLE WING VEHICLE CONFIGURATIONS Original Filed April 29, 1963 7 Sheets$heet 4 INVENTOR FRANCIS M. ROGALLO Z4424 BY fi ATTORNEYS July 13, 1965 F. M. ROGALLO 3,194,514

FLEXIBLE WING VEHICLE CONFIGURATIONS Original Filed April 29. 1963 '7 Sheets-Sheet 5 I le .l

ATTORNEYS July 13, 1965 F. M. ROGALLO FLEXIBLE WING VEHICLE CONFIGURATIONS Original Filed April 29, 1963 7 Sheets- Sheet e FIG. I7

\ 9 I96 2 & I88 i I95 INVENTOR FRANCIS M. ROGALLO ATTORNEYS FLEXIBLE WING VEHICLE CONFIGURATIONS Original Filed April 29, 1963 7 Sheets-Sheet 7 FIG. 25

INVENTOR' FRANCIS M. ROGAkLO ATTORNEYS United States Patent 3,13%,514 FLEXIBLE WING VEHPC'LE (JQNFIGURATXUNS Francis M. Rogallo, 17 Mitford Road, Newport News, Va. Original application Apr. 29, 1963, er. No. 276,664. Divided and this appiication Dec. 11, 1964, ar. No.

2 Claims. (631. 244-49 (Granted under Title 35, US. Code (1952), see. 266) of reentering the vehicle into an atmosphere and landing it on a planetary body.

Many problems are encountered upon the reentry of a space vehicle into an atmosphere. These problems result from the great speed at which the vehicle is traveling which generates tremendous heat. To overcome this difficulty ablative materials have been used to protect the vehicle structure from the heat. Vehicles capable of maintaining a shallow reentry have been proposed, but this requires a large wing area in relation to the vehicle weight. Due to existing booster capability and packaging techniques it is presently impossible to launch a vehicle having rigid wing structure which will meet the above mentioned requirements for reentry of the vehicle. Thus, many arrangements have been proposed wherein the vehicle is provided with small rigid wing surfaces; however, they fail to provide the necessary lift for maintaining a shallow reentry angle.

Also associated with this problem is the recovery of rocket boosters. To date, the booster has been separated from the payload at predetermined positions and allowered to destroy itself upon reentry into the atmosphere. As the booster capability becomes bigger and more expensive some means of retrieving this mechanism for reuse becomes mandatory. The same problems are inherent in recovery of the boosters that plague vehicle reentry. These problems being that of speed, reentry angle, heat, wing surface area and others.

The present invention is believed to provide a solution for many of the above mentioned ditficulties. This is accomplished by providing the vehicle with flexible wing structure which can be readily packaged for launch purposes, yet can be deployed to provide the necessary lift surface for reentry at higher altitudes thereby reducing temperatures by radiating the heat generated during reentry and providing a low-speed flight capability to simplify the landing operation. The flexible wing can be utilized in combination with the vehicle structure which may include a payload alone, a payload in combination with booster structure or booster structure alone. Such an arrangement provides the further advantage of choice of landing site since the vehicle is maneuverable and if powered approaches the flexibility of conventional aircraft.

It is, therefore, an object of this invention to provide a vehicle having flexible wing structure which is collapsible to facilitate vehicle launch.

Still another object of this invention is to provide a vehicle having flexible wing structure capable of maintaining a shallow reentry angle into an atmosphere.

3,194,514 Patel ted July 13, 1965 ice Yet another object of this invention is to provide a vehicle having a flexible wing configuration which is capable of recovering a spent rocket booster or boosters.

Another object of this invention is to provide a flexible wing vehicle wherein the body of the vehicle is separable to provide components of the flexible wing structure.

Another object of this invention is to provide techniques for positioning the flexible wing material prior to reentry of the vehicle into an atmosphere.

An object of this invention is to provide a flexible wing vehicle having structure for transferring loads from one section of the vehicle to another to gain maximum utilization of the flexible wing configuration.

A further object of this invention is to provide means for controlling the flight path of the flexible wing vehicle upon reentry into an atmosphere.

These and other objects and advantages of the invention will become more apparent upon reading the specification in conjunction with the accompanying drawings.

In the drawings:

FIG. 1 is a side elevational view showing a flexible wing vehicle collapsed and in a position for launch;

FIG. 2 is a plan view of the flexible wing vehicle as it would appear in a flight position;

FIG. 3 is a perspective view of the vehicle shown in FIG. 2, showing in greater detail a truss arrangement for transferring vehicle loads from one section to another, the truss arrangement also operating as a control system for controlling the flight path of the vehicle;

FIG. 4 is a side elevational view of the vehicle shown in FIGS. l-3;

FIG. 5 is an end view of the flexible wing vehicle shown in FEGS. 1-4, and further illustrating control mechanism for determining the flight path of the vehicle;

FIG. 6 is a segmental, cross sectional view showing a pivotal connection and locking arrangement for the truss structure;

FIG. 7 is an end view of a modified form of the invention showing the utilization of the combination truss and control structure with a bi-flexible wing arrangement;

FIG. 8 is a side elevational view of the flexible wing vehicle shown in FIG. 7;

FIG. 9 is a plan view of a modified form of the invention showing a pair of boosters pivotally connected to a payload;

FIG. 16 is a side elevational view of the vehicle shown in PEG. 9;

FIG. ll is a plan view of a flexible wing vehicle showing a pair of boosters pivotally joined at their apex;

FlG. 12 is a side elevational view of the vehicle shown in FIG. 11;

PEG. 13 is a plan View of still another form of the invention showing a vehicle having a pair of boosters which separate to form a flexible wing configuration;

FIG. 14 is an end view of the vehicle shown in FIG. 13;

FIG. 15 is a plan View of still another modification of the flexible wing vehicle showing an arrangement whereby the flexible wing structure is deployed from the vehicle;

FIG. 16 is an end view of the vehicle shown in FIG. 15;

FIG. 17 is a segmental view showing structure for deploying components of the vehicle shown in FIGS. 15 and 16;

FIG. 18 is a segmental view, partly in cross section, showing mechanism for locking components shown in FIGS. l5-16 in a deployed or erected position;

FIG. 19 is a segmental View, partially cut away, showing a technique for extending flexible wing material;

FIG. is a cross sectional view taken along the section lines XX-XX of FIG. 19;

FIG. 21 is a segmental view, partly cut away to show mechanism for moving the flexible wing material.

FIG. 22 is a plan view of yet another flexible wing vehicle showing another type of flexible wing deployable from the vehicle body;

FIG. 23 is an end view of the vehicle shown in FIG. 22;

FIG. 24 is a plan view of a further form of the invention; and

FIG. is a side elevational view of the vehicle shown in FIG. 24, and shown in the folded position.

Basically, this invention relates to a technique for launching a vehicle into an extraplanetary spatial vacuum and thereafter forming a flexible wing configuration for returning the vehicle into an atmosphere and landing it on a planetary surface. This concept has application to many configurations and combinations; however; for a brief description of the invention the vehicle will be considered to consist of a payload and three boosters. The one booster is formed integral with the payload and together this structure forms the central body member of the vehicle. The other two boosters are pivotally connected to the central body member and are adapted to lie adjacent the first mentioned booster member to provide a compact launch configuration. Flexible wing ma terial is connected to the side boosters and the center booster or central body member. The flexible wing material is flexible to the degree that it can be folded like a parachute and is, therefore, easily packaged between the folded boosters. The vehicle is launched in this configuration and may go into orbit or otherwise perform its contemplated mission. When it is desired to recover the vehicle the side boosters are deployed. Appropriate expansion mechanism is provided between the central booster and the side boosters to force the side boosters to move about the pivotal connection with the central body members. Upon deployment of the side boosters the flexible wing material is spread since it is connected to the boosters. The vehicle is thereby provided with wing structure for gliding or powered reentry into the atmosphere and thereafter a landing on a planetary surface. Appropriate controls are provided to direct the flight path of the vehicle.

Referring now more specifically to the details of the invention FIGS. 1-5 show a form of the convertible flexible wing vehicle invention, designated generally by the reference numeral 10.

The vehicle 10 has a keel or central body member 12 which in this embodiment is a booster having a nozzle 13. Formed integral with the booster or attached thereto in a conventional manner is a payload 14. The payload 14 is located at the upper end of the booster 12 and may be a space vehicle, satellite, space experiment, or numerous other payload items.

Connected to the upper end of the booster 12 or the lower end of the payload 14 are boosters 16 and 17. The boosters 16 and 17 also operate as leading edge wing members in a manner to be explained more fully hereinafter. The boosters are connected to the central body member by conventional pivot connection 18 and 19 (FIG. 2). This pivotal connection can be of a hinge type or the boosters may be recessed to allow proper clustering of the boosters for launch, or the boosters may be positioned adjacent each other in substantially the same plane and the payload configuration enlarged so as to generally form a nose cone for the boosters to improve the aerodynamic configuration of the vehicle upon launch. The side boosters in FIGS. 1-5 are shown as being smaller; however, it is within the scope of the invention to make them the same size or larger than the central booster. The members 16 and 17 can also be fuel cells to supply the large central booster or vice versa,

Structure is provided for causing the boosters 16 and 17 to move about their respective pivot points 18 and 19 or to expand or deploy the flexible wing. This structure is best illustrated in FIG. 2 and includes the expansion link pairs 20 and 21. The pair 20 has their ends pivotally connected together and the one length of the pair is pivotally connected to the booster 16, and the other link has its other end pivotally connected to the booster 12. The pair .21 is constructed similarly but it is connected between the booster 17 and the booster 12. An actuator 22, which may be of the pneumatic or hydraulic type, is carried by the central body member or booster 12, and has an actuator rod 25. The actuator rod 25 is in turn connected to actuator bars 23 and 24 which join the link pairs 20 and 21. The actuator bars are pivotal'ly connected to the link pairs on the same pivot that connects the link pairs together. Energization of the actuator 22 results in the links expanding from a folded position to the osition shown in FIG. 2. The link pairs thus force the boosters 16 and 17 to pivot about their pivotal connections to the expanded position. The link pairs 20 and 21 may be designed such that they move over center to fix the boosters 16 and 17 in a particular deployed position, or may be designed to move to a position short of center and thereby utilize the resiliency of the actuator to allow the boosters 16 and 17 some movement. The latter arrangement is often preferable since the vehicle may hit wind gusts, and changing aerodynamic conditions which would make a certain amount of flexibility in the body structure desirable.

Flexible wing material 26 is connected to the booster 12 and to the boosters 16 and 17 in a conventional manner such as by bonding, riveting, stapling, forming a slot in the boosters and anchoring the material under the slot with an enlarged rod or other techniques. The flexible material may be any of a number of materials, certain of the thin plastic materials being particularly adapted for such use. This material is highly flexible and capable of being folded in a manner similar to an ordinary piece of cloth yet very strong and capable of supporting great loads. It should be understood that the term flexible material or flexible wing material used throughout the specification and claims is meant to have the definition that the wing or material take no particular configuration due to its inh-erentflexibility. In other words, the flexible material under no load conditions would take no particular shape or configuration. It is readily apparent from the FIG. 2 illustration that the flexible wing material 26 will be spread into the general wing configuration shown upon deployment of the boosters 16 and 17 by the actuator 22.

In order to minimize structural design problems as a result of the pivotal connection of the boosters 16 and 17 on the central body member, these boosters being otherwise unsupported, a truss arrangement 3t) can be utilized to transfer some of the load from the side boosters to the central booster. It should be understood, however, that such a truss'arrange-ment is not necessary if the weight is properly distributed between the payloads or boosters. The truss arrangement when utilized is best illustrated in FIGS. 2-5 and particularly FIG. 3. It consists of a telescoping vertical strut 31, the strut being of a telescoping nature to facilitate collapsing and having a conventional latch (not shown) to maintain its parts in the proper position when erected. The vertical strut has a pivotal point 32 at its 'lower end with booster 12. At the upper end the vertical strut carries a double ball arrangement one each of which engages a socket formed in the upper end of the elevon struts 34 and as. The lower end of elevon strut S tbas a ball and socket connection 35 with the booster 16. The elevon st-rut 36 has a similar ball and socket connection 37 with the booster 17.

A cross sectional view of the ball and socket arrangement 3''] is shown in FIG. 6. The ball 39 is connected to the elevon strut 36 by the shank 38. The ball 39 has an aperture 48 to receive a latch pin to be described hereinafter. The socket 41 receives the ball 39 which is journaled therein. The socket 41 has an opening 43 which allows the latch pin to pass through the socket and to enter into the ball 39. It also has a slot 42 which allows the shank of the elevon strut to ope-rate therein. The ball and socket is associated with a latch 44 which has a well 45. The latch well 45 contains a spring 46 and latch pin 47. The ball and socket arrangement connecting the truss members together and the truss to the vehicle is necessary to al'low collapse of the truss structure for launch purposes. The slot 42 in the ball and socket 37 and the other balls and sockets 32 and 35 similarly designed, allows the truss structure to fold forward. The double ball and socket arrangement 33, of conventional design, not illustrated in detail, at the apex of the truss, allows the eleven struts 34 and 36 to fold against the vertical strut 31. Thus, the truss can be collapsed to facilitate launch of the vehicle. A truss erection cable 53 is connected to the vertical strut 31 and to this structure is a motorized winch 54 (shown diagrammatically in H6. 3). This structure is utilized to pull the truss into an upright position. The truss is spread upon operation of the actuator 22 to expand the boosters. As shown in FIG. 6 when the truss is moved to the upright position the spring urged latch pin 47 will pass into the opening 40 formed in the ball 39 and maintain the truss arrangement in the upright position. The eleven struts 34 and 36 are under compression during flight operation and transfer the load from the leading edges 16 and 17 forming a part of the flexible wing to the vertical strut 31 and thereby relieve much of the load on the pivotal connections 18 and 19. The truss arrangement also tends to spread the leading edges 16 and 17, and thereby the flexible wing material providing a greater wing span and additional lift.

The truss arrangement 30 also operates as a control means for directing flight of the vehicle. A motivator 50 is carried by the vertical strut 31 and has arms 51 and 52 (FIG. 5) which are connected to the eleven struts 34 and 36 respectively. Since the elevon struts 34 and 36 are airfoil shaped, symmetrical movement of the elevons will cause a pitching movement of the vehicle, and differential movement turning of the vehicle. The arms 51 and 52 may be in the form of cables to facilitate collapse of the truss structure for launch purposes.

An alternate embodiment of the invention is shown in FIGS. 7 and 8 which incorporates many of the principles shown in the vehicle of FIGS. 1-5. This flexible wing vehicle is designated generally by the reference numeral 58.

The vehicle 58 includes a body member 60 which may consist of a booster, payload combination, or a booster alone. This vehicle diflers from the vehicle in that only a central body member 60 is shown; however, it is to be understood that within thebroadest aspect of the invention additional booster elements could be associated therewith. The lower leading edge wing numbers 62 and 63, therefore, serve only this purpose where in the previous embodiment the side boosters operated both as booster and leading edge wing members. The members 62 and 63 are hinged to the booster 60 by a conventional hinge arrangement shown diagrammatically, and designated by the reference numeral 64. A flexible membrane or wing surface 65 is connected to the central body member 60 and to the lower leading edge wing members 62 and 63. a

A truss arrangement including a vertical strut 66 end compression struts 69 and 71 have pivotal conections 67, 68, 70, and 72 respectively with the body 60 and leading edge wing numbers. The pivot arrangement may be similar to that shown in FIG. 6. The struts are connected together at their apex with a double ball and socket arrangement similar to that in the FIGS. 1-5 embodiment. The compression struts 69 and 71 may also operate as elevons; however, are shown merely as compression struts in the drawings.

This vehicle is a bi-wing vehicle, the upper wing having a keel 75. Upper wing leading edge members 76 and 77 are hinged at 78 to the keel in a conventional manner. Flexible material or membrane 30 is connected to the upper leading edge members 76 and 77 and to the keel 75.

The upper flexible wing is mounted over the lower flexible wing and has the keel thereof fixed to the top of vertical strut 66. In addition the upper and lower flexible wings are connected together by a nose wire or strut 81, diagonal wire 82 and tension wires 83 and 84. The nose wire is connected between the hinge points of the upper and lower wings. The diagonal wire is connected between the nose of the lower flexible wing and the rearmost portion of the upper wing keel. The tension wires are fixed between the rearmost portions of the upper and lower leading edge wing members. These wires are all clearly shown in FIGS. 7 and 8. The truss arrangement functions in a manner similar to that described in vehicle 14). In addition, the compression struts function to transfer the load from the upper flexible wing leading edge members to the central body member 60 via the tension wires 83 and 84. The nose wire 81 operates to maintain the same attitude between the upper and lower flexible wings as does the diagonal wire 82. It should also be mentioned that the diagonal wire 82 and the tension wires 83 and 84 can be utilized to control flight direction of the vehicle. This is accomplished by providing each wire with a mechanized takeup and playout device. By taking up and letting out the diagonal wire 82 the position of the top wing can be shifted controlling the pitch of the vehicle. By differentially taking in and letting out the tension wires 83 and 84 the upper flexible wing could be warped so as to turn the vehicle in the direction desired.

The bi-flexible wing vehicle 58 may be particularly adapted to recovering large single boosters or payloads. The additional wing, of course, provides additional lift making it possible to recover vehicles of great weight. The truss and tension wire arrangement also provides means whereby the maximum lift capability is obtained from each wing utilizing simple structure which is readily collapsible and packageable to facilitate launch procedures. Although a bi-wing arrangement is shown, it is to be understood that it is within the scope of the invention to make a tri-wing arrangement or additional wings as the situation might demand.

FIGS. 9 and 10 show still another embodiment of the invention, the flexible wing vehicle being designated generally by the reference numeral 90.

The vehicle includes a payload or similar item 92 to which are pivotally connected leading edge boosters 93 and 94. These boosters have a pivotal connection at 95 and 96 (represented diagrammatically) the connection being similar to those in previous embodiments. A flexible wing membrane 97 is connected between the boosters 93 and 94. The membrane is fixed to the boosters in a conventional manner.

An actuator 99 is carried by the payload 92 and has an actuator rod 186 which is in turn pivotally connected to spreader links 98. Spreader links 98 are joined at their ends by the actuator rod connection, and otherwise pivotally connected to the boosters 93 and 94 as illustrated in FIG. 9. The boosters 93 and 94 are designed so as to fold together and assume a position of adjacency for launch purposes. The spreader links 98 are collapsed in this position. Upon energization of the actuator 99 the links are forced to open thereby deploying the boosters 93 and 94 and spreading the flexible wing material 97.

The flexible wing vehicle is controlled by a canard 101 attached to the nose of the payload. The canard 101 is joined to a mechanized gimble having at least two degrees freedom of motion. The canard can be moved in and 107 in a conventional manner.

sleeve 115 which faces the hinge.

8,1 7 one plane to give pitching action and simultaneously in two planes to give directional control.

The flexible wing vehicle differs from the previous embodiments in that the flexible wing material forms a single lobe wherein as in the previous embodiments the double lobe wing configuration was utilized. It has been found from test models that either configuration will provide adequate wing surface and lift for flight purposes and the control systems described are applicable to both. As in the previous embodiment, the spreader mechanism may be designed so that the links pass over center and lock the boosters in the deployed position. On the other hand, the links may be moved to a position short of center whereby the boosters are allowed to pivot to a degree, utilizing the fluid of the actuator as a cushion for changing aerodynamic conditions.

A form of the invention is shown in FIGS. 11 and 12 wherein the vehicle body elements are hinged directly together at their apex. This flexible wing vehicle is designated generally by the reference numeral 105.

The vehicle has a body which is formed from payloads or payload-booster combination members 106 and 107. The boosters 106 and 107 are pivotally connected at their apex by a hinge 110. The hinge 110 may be a post like element about which the booster structure is interlaced to pivot.

Flexible wing material 111 is fixed to the boosters 106 As in certain of the previously discussed embodiments, the boosters form the leading edge members of the flexible wing. The boosters may be moved to a position of adjacency for launch purposes and thereafter deployed to form the flexible wing configuration by expansion mechanism.

at the other end to a guide post support 117. The guide post support 117 may be made of a telescoping design to facilitate folding the boosters 106 and 107. A compression spring 116 surrounds the guide post 114 and is located between the hinge structure 110 and the end of The spring 116 constantly urges the sleeve in a manner so that the expan sion legs 112 and 113 force the boosters 105 and 107 apart. During launch operation the boosters 105 and 107 are held in the collapsed position by conventional structure such as a Marman band. When it is desirable to deploy the vehicle the band is released allowing the spring 116 to expand the boosters.

The vehicle 105 has conventional type horizontal and vertical control surfaces including rudders and elevators. The vertical surface 118 being carried by the horizontal 119 which is attached to the tail portion of booster 106. The vertical surface 120 and horizontal surface 121 are arranged in a similar manner and secured to the booster 107. Conventional control cables and mechanism are associated with the rudders and elevators but are not shown in detail.

Still another form of the invention is shown in FIGS. 13 and 14, and the vehicle designated generally by the reference numeral 130. In this arrangement the body of the vehicle in effect splits forming a flexible wing vehicle configuration.

The vehicle includes a body which consists of members 132 and 138. These members may be boosters, booster-payload combinations; however, for purposes of illustration the body is considered to consist of a pair of boosters. The booster 132 has a forward guide channel 133 and aft guide channel 134. The booster 138 a forward guide channel 139 and aft guide channel 140. These guide channels are utilized to direct the path of travel of extension mechanism components, to be explained more fully subsequently.

Also attached to the booster body 132 is a control surface 135, and to the booster 133 a control surface 141. The control surfaces and 1 11 are canted or skewed as shown in FIG. 14, and thereby function as both horizontal and vertical control surfaces. Conventional control mechanism is associated with the movable portions of the control surfaces to provide operation thereof.

Flexible wing material 142 is fixed to the booster 132 and to the booster 138. The flexible material may be rigidly fixed to each of the boosters, or means may be provided in a manner whereby the material is drawn off from a roller as expansion mechanism is in operation.

The expansion mechanism includes expansion straps 143 and 1 2-4 which are overlapped and pivotally-connected together at their geometric centers to form a scissors-like arrangement. The ends of expansion strip 143 are pivotally connected to a slide 146 operable in the guide channel 133, and the other end of the expansion strap pivotally connected to a slide 148 operable in the guide channel 140. The expansion strip 144- has one of its ends pivotally connected to a slide 14-7 operable in the guide channel 134 and its other end pivotally connected to a slide 149 operable in the guide channel 139. As shown in FIG. 13 a mechanized winch 150 (shown diagrammatically) is designed to take in and play out cables 151 and 152 connected to the expansion strips 143 and 144, respectively. A mechanized winch 153 and cables 154 and 155 are similarly connected to the expansion straps associated with the booster 138. As shown in FIG. 13, taking up the cables by use of the winch mechanism will draw the ends of the expansion straps together causing the boosters 132 and 138 to separate. As the boosters separate the flexible wing material 142 is unfolded or unrolled to form a flexible wing vehicle capable of flight. As in the previous embodiments, the boosters are moved to a position of adjacency to facilitate launching the vehicle.

A further embodiment of the invention is illustrated in FIGS. 15 and 16, this vehicle being designated generally by the reference numeral 160. The vehicle 160, like the vehicle 58, is designed primarily for use with recovery of a single booster or payload configuration.

The vehicle has a body 162 which for purpose of illustration may be considered a booster. It has horizontal and vertical control surfaces 163 and 164 having elevators and rudders respectively, operable by conventional mechanism for controlling the flight path of the vehicle.

The flexible wing structure 165 is of a flexible nature, and is designed to be collapsible to facilitate launch purposes. The wing 165 includes a leading edge member 166 having a T-shaped slot 167 (FIGS. 19 and 20) in its trailing edge for purposes which will be explained presently. A wire conduit 163 and cover plate 169 (FIG. 20) also form a part of the leading edge member 166.

The wing 165 also has a trailing edge member 171 spaced from the leading edge member and staggered with respect thereto to facilitate the folding of the members. A T-shaped slot 172 is formed in the leading edge of the trailing edge member and faces the T-shaped slot 167.

Flexible wing material 175 is positioned between the wing leading and trailing edge members by mechanism shown in FIGS. 19 through 21. Flexible wing material 175 is wound on a spring loaded roller 182. which is supported in brackets 183 and 183a. The end of the flexible material 175 is folded over to form a hem which houses a slat 176 (FIG. 19). Attached to the slat 176 are carriers 177 and'178. The carrier 177 has a T- shaped cross section as shown in FIG. 20, the head of the carrier operating in T-shaped slot 167 and the tail of the carrier being split and designed to clamp the flexible material therebetween. The carrier 17% is similarly designed and is operative in the T-shaped slot 172 of the trailing edge member. The slat 176 attached to or formed integral with the carriers 1'77 and 178 form a stiffened edge on the flexible material 175 which allows the material to be pulled off the roller 132 to the tips of the leading and trailing edge members.

The mechanism for doing this is best shown in FIG. 21, and includes a wire 179 which is fixed to the carrier 177. The wire 179 passes through the T-shaped slot 167 around a pulley 13d and back through the wire conduit 168 to a mechanized takeup drum 181. Rotation of the takeup mechanism in the clockwise direction as shown in FIG. 21, results in the wire 179 being wound onto the drum and the carrier 17? being pulled towards the pulley 18%). The pulley 18% is located in the tip of the leading edge member so that when the carrier 177 reaches this position the flexible wing material 175, including the leading and trailing edge members form the wing surface. In certain applications structure must be provided in both the leading and trailing edge members to unroll the flexible material; however, in other applications only one such system is necessary due to the interconnecting slat 1'36.

Coupling blocks 184 and 184a are provided to allow collapsing of the leading and trailing edge members and to guide the gliders 177 and 178 into the T-shaped slots 167 and 1'72. The coupling blocks 1% and 184a have T-shaped slots litand 185a which are in alinement with the slots formed in the leading and trailing edge members. Stop plates 1% and 186a are associated with the coupling blocks 184 and 134a respectively, to prevent the gliders from being drawn onto the spring loaded roller 182. As shown in FIG. 19 the space between the leading edge member 165 and coupling block 184- and the trailing edge member 172 and the coupling block 184a is such that it is possible to pivot the leading and trailing members to a collapsed position, yet are close enough together so as to make an easy transition from the coupling blocks to the leading and trailing edge members.

Mechanism for moving the leading edge member 166 from a collapsed position to an erected position is best shown in FIG. 17. This is accomplished by a rack and pinion arrangement, the pinion 187 being fixed to the leading edge member 166 and the unit journaled about an axle carried by the body member. The pinion 137 has teeth which mesh with a rack 139 also carried by appropriate structure in the body member. The rack 139 is moved by a motorized operator 1% which includes a gear having teeth meshing with the rack teeth. According to well known mechanical principles, when the rack translates the pinion is rotated and moves the leading edge member to the desired position.

The leading edge member is maintained in the erected position by a latch arrangement 192. The latch is of simple construction, it having a chamber .194 which houses a compression spring 1%. The compression spring 1% bears against a latch bolt 1% which projects through a chamber opening into a pinion aperture 138, as best shown in FIG. 18. Although not shown similar structure is utilized for erecting the trailing edge member 172 and; therefore, will not be explained in detail. Liliewise the wing structure for only one side of the vehicle has been explained, but it is to be understood that the details of the opposite wing panel are similar. The mechanism for erecting the leading and trailing edge members may be constructed and arranged so that both members fold toward the tail of the vehicle or one toward the tail and one toward the front of the vehicle.

A form of the invention is shown in FIGS. 22 and 23 which is similar to the vehicle 16%, but difters in that only the leading edge wing member is utilized and a different shaped wing panel provided. This vehicle is designated generally by the reference numeral 2%.

The vehicle 2% has a body taking the form of a booster for purposes of illustration. The tail section of the body 202 is provided with horizontal and vertical surfaces 293 and 2&4 having movable control portions similar to that in a conventional aircraft.

The wing 2% includes leading edge members 2% which are similar in design to the leading edge member 166 of vehicle .161). The leading edge member may differ some what; however, in that the flexible wing material 2i)? may be directly connected to the leading edge member, rather than rolled out as in the vehicle 16G. It should be understood; however, that within the broadest aspect of the invention the flexible wing material 267 may also be moved to its extended position by mechanism similar to that utilized in vehicle 169. The means for erecting the leading edge member 296 is similar to that shown for erecting the leading edge member 166. Obviously, other techniques Within the skill of the art may be utilized to move the leading edge members through an angle of as much as Yet another form of the invention is shown in FIGS. 24 and 25, designated generally by the reference numeral 21%.

The vehicle 210 includes a body 212 which may be in the form of a booster. Leading edge members 214 and 217 have pivotal connections 215 and 218, respectively, on the apex of the body 212. The leading edge member 214 has an intermediate joint 216 and the leading edge 217 an intermediate joint 219. These joints may be of a hinge type or ball and socket arrangement and are designed so that the leading edge members told on themselves to facilitate a compact packaging arrangement. Flexible wing material 229 is fixed to the body 212 and leading edge members 214 and 217 in a conventional manner. Fold lines 221 and 222 are shown on FIGURE 24, and represent the approximate line along which the flexible material would fold to form the compact arrangement shown in FIG. 25.

The leading edge members 214 and 217 can be made approximately twice the length of the body member 212 and jointed at the center. The leading edge members when in the folded position would be of approximately the same length as the booster to facilitate launch of the vehicle. It should be understood however, that within the broadest aspect of the invention the leading edge members may be divided into shorter components. Also, the leading edge members may take the form of fuel cells, boosters and other structure as indicated in the previous vehicle arrangements. As shown in FIG. 24, the vehicle 219 is capable of having wings of a high aspect ratio which may provide desirable aerodynamic advantages under certain flight conditions and circumstances. The leading edge members 214 and 217 are shown as folding in a manner so that the flexible material is folded on top of itself or below itself. It is to be understood, that it is within the purview of the invention to fold the leading edge members in a manner such that they are side by side rather than above or below each other.

Structure such as a cable and a motorized winch may be attached to the portion of the wings which must be unfolded; however, these portions of the wings upon engaging the airstream may be unfolded by the airstream. it is also contemplated that the vehicle may be controlled by moving the section of the wings rearward of the joints 216 and 219 by conventional control mechanism. If this type of control is not utilized, some type of latch, similar to that shown in FIG. 6, may be combined with joints 216 and 2119 to lock the leading edge members in their unfolded position.

From the above description, the operation of the various vehicles are believed clear. In each configuration of vehicle, the appendages of the vehicle body are folded ill or collapsed into a position of adjacency. This is true Whether or not the particular configuration involves several boosters or one booster having a collapsible wing structure. It should also be understood, that it is within the scope of the invention to provide an additional housing for any of the configurations to provide more efficient aerodynamic shapes for launch purposes. Thereafter, when it is desired to reenter the vehicle or otherwise utilize the vehicle in its flight configuration, the casing may be jettisoned by conventional mechanism, such as explosive bolts, exposing the vehicles substantially as shown and described. It is further apparent, that in certain instances and with certain vehicle configurations it may be desirable to house or streamline only certain portions of the vehicle and jettison these portions when the flight configuration is necessary.

From the above description it is readily apparent that the invention provides means whereby large payloads and/ or boosters can be recovered providing a great savings in material and money now being lost. The flexible wing vehicle is capable of maintaining a shallow reentry angle requiring minimum use of ablative material. The flexible wing vehicle is designed such that it may glide to a desired landing position or be powered to a predetermined landing site. Obviously, the invention has application to many situations which include recovery of boosters from multistage missiles after burnout and separation, return of supply or fuel tanks which have been attached to a space station after the supplies or fuel have been consumed. The flexible wing vehicle could also be used to return space ships after rendezvous operations with space station. It should also be understood, that the invention is not limited to space operations or applications,

the configurations could be motorized for lower altitude craft. The various shapes of the wings can be modified to conform to the particular situation required, and also the aspect ratios of the wings varied to provide higher efiiciency under certain circumstances. It is also suggested that the flexible Wing vehicle may have particular merit as a reentry craft to eliminate the existing problem of communication blackout. The termination of communication during reentry is attributable to the high reentry temperatures, angle of reentry and heat all of which are greatly minimized with the invention vehicle.

It is to be understood that the foregoing disclosure relates only to preferred embodiments of the invention, and that numerous modifications and variations of the present invention are possible in the light of the above teachings, without departing from the spirit and the scope of the invention, as set forth in the appended claims.

I claim:

1. A vehicle capable of being launched from a planetary surface into an extraplanetary spatial vacuum and to reenter an atmosphere comprising: vehicle body means; power means associated with said body means for placing said vehicle in an interplanetary spatial vacuum; means forming a part of said body being deployable from remaining body means to form wing support structure; said wing support structure including Wing leading edge members; flexible material means being connected between said leading edge members and said body means; at least one additional flexible wing means; and connection means joining said additional flexible wing means in spaced adjacency to said leading edge members and to said remaining body means to form at least a bi-Wing arrangement.

2. A vehicle capable of being launched from a planetary surface into an extraplanetary spatial vacuum and to reenter an atmosphere as in claim 1 wherein truss means is connected between said remaining body means and said leading edge members forming part of said connection means joining said additional wing means;

wire means connecting said additional Wing means and said leading edge members; said Wires transferring load from said additional flexible wing means to said leading edge members and said truss means transferring loads from said leading edge members to said remaining body means.

No references cited.

FERGUS S. MIDDLETON, Primary Examiner. 

1. A VEHICLE CAPABLE OF BEING LAUNCHED FROM A PLANETARY SURFACE INTO AN EXTRAPLANETARY SPATIAL VACUUM AND TO REENTER AN ATMOSPHERE COMPRISING: VEHICLE BODY MEANS; POWER MEANS ASSOCIATED WITH SAID BODY MEANS FOR PLACING SAID VEHICLE IN AN INTERPLANETARY SPATIAL VACUUM; MEANS FORMING A PART OF SAID BODY BEING DEPLOYABLE FROM REMAINING BODY MEANS TO FORM WING SUPPORT STRUCTURE; SAID WING SUPPORT STRUCTURE INCLUDING WING LEADING EDGE MEMBERS; FLEXIBLE MATERIAL MEANS BEING CONNECTED BETWEEN SAID LEADING EDGE MEMBERS AND SAID BODY MEANS; AT LEAST ONE ADDITIONAL FLEXIBLE WING MEANS; AND CONNECTION MEANS JOINING SAID ADDITIONAL FLEXIBLE WING MEANS IN SPACED ADJACENT TO SAID LEADING EDGE MEMBERS AND TO SAID REMAINING BODY MEANS TO FORM AT LEAST A BI-WING ARRANGEMENT. 